The story of Edison's invention of electric light Edison began to reform the experiment of arc light from 1877, and proposed to divide current and turn arc light into white light. The experiment should reach a satisfactory level. It is necessary to find a substance that can burn to white heat as a filament, and can withstand high-temperature combustion of more than 2000 degrees 1000 hours. At the same time, the usage should be simple, can withstand the impact of daily use, and the price should be low. It is also necessary to turn on and off one lamp without affecting the turn-off of any other lamp and maintain the relative independence of each lamp. This was a very bold idea at that time, which required great efforts to explore and experiment. As for the materials used to make silk, Edison first experimented with carbonized materials, then failed to experiment with platinum-iridium alloy with high melting point, and made 1600 different experiments with fine ores and seedlings, all of which failed. But at this time, he and his assistants have made great progress, knowing that incandescent filament must be sealed in a highly vacuum glass ball and not easily dissolved. In this way, his experiment returned to carbon wire. He used it day and night, until the first half of 1880, Edison's incandescent lamp experiment was still inconclusive. One day, he tore a bamboo filament tied to the edge of a banana fan in the laboratory into filaments and devoted all his energy to carbonization. Only the carbonation experiments of plants have reached more than 6000 kinds. Three years have passed since his experimental notebooks reached more than 200, with a total of more than 40,000 pages. He works eighteen or nine hours a day. At three or four o'clock every morning, he only sleeps under the experimental table with two or three books on his head. Sometimes he sleeps on the stool three or four times a day for only half an hour at a time. By the first half of 1880, Edison's experiment with incandescent lamps was still inconclusive, and even his assistants were discouraged. One day, he tore a bamboo filament tied to the edge of a banana fan in the laboratory into filaments and carbonized it into filaments. The result is better than all previous experiments. This is Edison's first incandescent electric lamp-bamboo filament electric lamp. This kind of bamboo filament lamp lasted for many years. It was not until 1908 that tungsten was invented as a filament and was replaced. Edison began to develop alkaline batteries after this, which was very difficult, and his research spirit was even more amazing. This kind of battery is used to provide power. He and a selected assistant have studied hard for nearly ten years and experienced many hardships and failures. One moment he thought he had reached his destination, but the next he knew he was wrong. But Edison never wavered and started again. It took about 50,000 tests and 150 test notes to achieve the goal.